"24 Hours on Earth" (9 p.m., BBC America): This epic two-part documentary takes pains to examine, in great detail, how various animals and plants adapt over the course of a single day as conditions around them change. And somehow, they make it really interesting.

"Trophy Wife" (9:31 p.m., ABC): After finding videos of Pete's (Bradley Whitford) weddings to Diane and Jackie (Marcia Gay Harden, Michaela Watkins), a jealous Kate (Malin Akerman) realizes she missed out on something special by having a no-frills quickie at the courthouse and wants a real wedding. Tonight's episode is the first of a two-parter.